OPEX Work isn’t an energy systems test. It’s a behavior observation tool.⁠ 10 minutes on an Assault bike. Accumulate calories.⁠ ⁠ But here’s what you’re actually watching:⁠ → Do they pace or crash?⁠ → Do they know what high effort feels like?⁠ → Can they sustain without falling apart?⁠ → How do they approach work?⁠ Then you design based on what you observe.⁠ ⁠ Examples:⁠ Can’t move 60 min non-stop? Start with daily walking 2-3x resistance training.⁠ Sprint then nosedive by minute 3? Teach pacing